JPS5919092A - Die and its manufacture by laser beam - Google Patents

Abstract

PURPOSE:To obtain a die which is easy to manufacture and to repair by fixing a thin steel sheet member with blade parts made of a thin steel sheet by a laser beam freely attachably and detachably to pedestals having the contour coinciding with the contour of the blade parts. CONSTITUTION:A thin hardenable steel sheet 3 is cut along a cutting line 4 by a laser beam 2 from a generator 1. Since the thickness of a cut part 5 from the cut face heated by the heat generated in the stage of cutting by the beam 2 is extremely thin, the cut part receives heating and quick air cooling in the same way as in ordinary hardeinong, whereby said part is quench hardened. The steel sheet parts 3a, 3b obtd. by such cutting are mounted to pedestals 6, 15 by fitting the knock pins 8b, 12b of pedestals 6, 15 having the contoured shape coinciding with the cutting line 4 of the parts 3a, 3b and further by bolt 10. A male die and a female die are formed by the above-mentioned method. Since the pedestals 6, 15 do not require hardening, ordinary steel materials are usable, and since the parts 3a, 3b are quench hardened only near the line 4, punching may be accomplished either before or after the cutting by the beam 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a mold from a thin steel plate using a radar object, and to the mold.

Typically, a mold consists of an upper mold and a lower mold, and the blades of the upper and lower molds match to cut the material.

In conventional molds, the blade part has a thickness of several centimeters,
Polished and hardened. 1 Such a mold is
If the blade part is chipped or worn out, it is necessary to re-polish and harden it1.In this way, conventional molds
Since the blade has a considerable thickness, manufacturing and repair require a great deal of time and expense.

In order to deal with this problem, thinner molds have been proposed, but these have not been satisfactory due to distortion caused by the quenching process.

It is an object of the present invention to provide a method of manufacturing a mold that is easy to manufacture and repair.

Another object of the present invention is to provide a method for fabricating a mold from a thin steel plate using a single laser beam.

Still another object of the present invention is to provide a mold that is easy to manufacture and inexpensive.

Another object of the present invention is to provide a mold made from a thin steel plate by means of a laser beam and free from thermal distortion.

Hereinafter, the present invention will be described in detail by way of embodiments with reference to the accompanying drawings.

Referring to FIG. 1, a hardenable thin steel plate 3 is cut along a cutting line 4 by a laser beam a2 emitted from a laser device 1.
This shows the state in which it is cut along.

The cut portion 5 of the steel plate 3 is extremely thin from the cut surface heated by the heat generated during cutting with a single laser beam, so it is hardened by heating and rapid air cooling in the same way as in normal hardening. . , parts 3 a and 3 b of the steel plate 3 obtained after being cut in this way constitute an upper mold and a lower mold, respectively.

Figures 2 and 6 show parts 3a- and 3b of the steel plate at the base 6.
．． 1 and 2, which show the process of forming an upper mold and a lower mold by attaching the steel plate to the steel plate 3a, the steel plate portion 3a has a countersunk hole 9a for the countersunk bolt 10 and a hole 8a for the dowel pin 8b.
91 base portion 6 is formed with a semi-cylindrical recess T1 whose outline coincides with the cutting line 4 of the copper phase portion 3a (see Fig. 1).
A screw hole 91) for the countersunk bolt 10 is formed, and a knock pin 8b is installed. Referring to FIG. 3, the steel plate portion 3b has a countersunk hole 11a for the countersunk bolt 10 and a hole 12a for the knock pin 12b.

The base portion 15 has a contour that matches the cutting line 4 of the steel portion 3b (see FIG. 1), and has a screw hole 1 for the countersunk bolt 10.
1b, and a dowel 8b is planted therein. 3. The base portion 6.15 shown in FIGS. 2 and 6 does not require hardening and may be made of ordinary steel. Further, since the steel plate parts 3a and 3b are quenched and hardened only in the vicinity of the cutting line 4, the countersunk holes 9a and 11a and the hole 8a are formed.

The formation of 12a may be performed before or after cutting by a laser beam.

4A to 6B show another embodiment of the present invention, in which only the lower mold is shown. In FIGS. 4A and 4B, the base portion 16 has a rim 14 formed at both ends of the upper surface; It works together with the knock pin 12b to prevent the steel plate portion 3b from shifting.

Referring to FIGS. 5A and 5B, the steel plate section 17 and the platform 20 are joined together by a dovetail joint 19 and secured to each other by countersunk bolts 10.

In FIGS. 6A and 6B, a U-shaped rim 22 is formed on the upper surface of the base 24, and the steel plate portion 21 is fixed to the base 24 by countersunk bolts 10 and is prevented from shifting by the rim. ing.

FIGS. 7 and 8 show still another embodiment of the present invention, with FIG. 7 being a diagram for explaining assembly, and FIG. 8 showing the lower mold after completion. The lower 3m is a copper phase part 31 having a blade part,
It includes a platform 28, 26 and a base member 25 made of a plurality of steel plates. The base part 26 is made of a thin steel plate with the same contour as the copper phase part 31, and the lowermost stage part 26 is fixed to the base part 25 by suitable means such as welding, and a pair of supports 27
has been planted. The steel portion 31 is formed with a countersunk hole 29 for receiving the countersunk bolt 10, and the base portion 28 is similarly formed with a hole (not shown) for the support column 27. The support column 2T has a screw hole for a countersunk bolt 10 formed therein. If the base part 28 is made of a steel plate of the same material as the steel plate part 31, when the steel plate part 31 is damaged or worn out, it is removed and the next base part 2B'f is replaced with a mold. Can be used as a blade. In this case, it is necessary to adjust the height of the support column 27.

In each of the embodiments shown in FIGS. 2 to 6B, the base of the mold can be formed by dividing into several arches in the thickness direction, as in the embodiments shown in FIGS. 7 and 8. .

As described above, according to the present invention, the part of the steel plate to be attached to the base of the mold can be formed by one process without laying the blade, so the grinding and polishing required to form the thick blade of the conventional mold can be The hardening process is not well received. Although the present invention can be applied to thick steel plates, the capacity of the laser single beam generator increases and the cost of materials also increases, so the effect is less than that for thin steel plates.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the formation of the blade part of the mold by a single laser beam, FIGS. 2 and 6 are diagrams showing the assembly of the upper and lower molds of the mold according to the present invention, and FIG. FIG. 8 is a diagram showing the lower die of a mold according to some other embodiments of the present invention. In the figure, 1... Radical beam generator 2...
...Rays one ray 3... Steel plate 3a, 3b, 17.21.31... Steel plate part 4...・Cutting line 6.15.16.20.24.26.28...
...Base part 8, bs12b...Dowel pin 10...
・・・・・・Collection of four Sara Porto agents, Asamura and Kōgai, Figure 1. -51'

Claims (1)

[Scope of Claims] (1) A mold including a thin steel plate member having a blade portion and a base portion having a contour matching the blade portion, the member being removably fixed to the base portion. (2. The mold according to claim 1, in which the member is fixed to the base by a screw such as a countersunk bolt. (3) The mold according to claim 2. The mold further includes a plurality of dowel pins for preventing displacement between the member and the base. (4) In the mold according to claim 2, the member and the base are dovetailed. (5) The mold according to claim 2 or 6, wherein the base portion has a rim formed on its upper surface to prevent displacement of the member. (6) The mold according to claim 1, in which the base portion is made of a plurality of thin steel plates having the same shape as the member. (7) From claim 1 The mold according to any one of items up to item 5, in which the platform is divided into several parts in the thickness direction. (8) Cutting a hardenable thin steel plate with a radar beam. (9) The method according to claim 8, further comprising: removing a portion of the thin steel plate having the blade portion to a base portion. A method of making a mold, including fixing it as possible.